This rubber multi-surface brushes is compatible with iRobot Roomba i3 i4 i6 i7 i8 7150 i7+ 7550 i3+ i4+i6+ i7+ i8+i6 E5 5134 E6 6198 E7 Robot Vacuum Cleaner. Product size: about 187*25mm Applicable models : i7, i7+, E5, E6 The replacement rollers for all floors also thoroughly clean large surfaces and guarantee sparkling clean surfaces. One brush cleaner moves dirt, the other rotates in the opposite direction around it to remove and vacuum it. Made of high quality rubber, the brush can easily remove stains. And brush roll accessories can be easily removed and replaced as part of routine maintenance. Kit includes: 2 Main Brush light green 2 Main Brush dark green. Tip: It is better to replace the brush for 2-5 months to keep your vacuum cleaner in the best condition and achieve better cleaning effect.